FreeBSD/Linux Kernel Cross Reference
sys/mips/include/bootinfo.h

     /*-
      * Copyright (c) 2013 Robert N. M. Watson
      * Copyright (C) 1994 by Rodney W. Grimes, Milwaukie, Oregon  97222
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer as
     *    the first lines of this file unmodified.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Rodney W. Grimes.
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY RODNEY W. GRIMES ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL RODNEY W. GRIMES BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef _MACHINE_BOOTINFO_H_
    #define _MACHINE_BOOTINFO_H_
    
    /* Only change the version number if you break compatibility. */
    #define BOOTINFO_VERSION        2
    
    #define MIPS_BOOTINFO_MAGIC     0xCDEACDEA
    
    #if defined(__mips_n32) || defined(__mips_n64)
    typedef uint64_t        bi_ptr_t;
    #else
    typedef uint32_t        bi_ptr_t;
    #endif
    
    /*
     * A zero bootinfo field often means that there is no info available.
     * Flags are used to indicate the validity of fields where zero is a
     * normal value.
     */
    struct bootinfo {
            /* bootinfo meta-data. */
            uint32_t        bi_version;
            uint32_t        bi_size;
    
            /* bootinfo contents. */
            uint64_t        bi_boot2opts;   /* boot2 flags to loader. */
            bi_ptr_t        bi_kernelname;  /* Pointer to name. */
            bi_ptr_t        bi_nfs_diskless;/* Pointer to NFS data. */
            bi_ptr_t        bi_dtb;         /* Pointer to dtb. */
            bi_ptr_t        bi_memsize;     /* Physical memory size in bytes. */
            bi_ptr_t        bi_modulep;     /* Preloaded modules. */
            bi_ptr_t        bi_boot_dev_type;       /* Boot-device type. */
            bi_ptr_t        bi_boot_dev_unitptr;    /* Boot-device unit/pointer. */
    };
    
    /*
     * Possible boot-device types passed from boot2 to loader, loader to kernel.
     * In most cases, the object pointed to will hold a filesystem; one exception
     * is BOOTINFO_DEV_TYPE_DRAM, which points to a pre-loaded object (e.g.,
     * loader, kernel).
     */
    #define BOOTINFO_DEV_TYPE_DRAM          0       /* DRAM loader/kernel (ptr). */
    #define BOOTINFO_DEV_TYPE_CFI           1       /* CFI flash (unit). */
    #define BOOTINFO_DEV_TYPE_SDCARD        2       /* SD card (unit). */
    
    #ifdef _KERNEL
    extern struct bootinfo  bootinfo;
    #endif
    
    #endif  /* !_MACHINE_BOOTINFO_H_ */

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